Add 30/25 and 90/21
1st number: 1 5/25, 2nd number: 4 6/21
30/25 + 90/21 is 192/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
30/25 = 30 × 21/25 × 21 = 630/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
90/21 = 90 × 25/21 × 25 = 2250/525 - Add the two like fractions:
630/525 + 2250/525 = 630 + 2250/525 = 2880/525 - 2880/525 simplified gives 192/35
- So, 30/25 + 90/21 = 192/35
In mixed form: 517/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/25+90/21 30/50+90/21 30/25+90/42 90/25+90/21 30/75+90/21 30/25+90/63